Transmission



Jul 6 192 1,591,392.

- J. L. LUNDB ERG v TRANSMISSION Filed-Sept. 27. 1924 6 s ls t' 1 a I I INVENTOR. a5 757,

ATTORNEY.

July 6 1926. 1,591,392.

J. L. LUNDBERG I TRANSMISSION V Filed Sept. 27, 1924 6 shetgshef ,2

I I I l i1 E I i E I I I {I M I I I l 1 I l I 1 I H w I \a I I INVENTOR. $77 1;. 111 13 3 ATTORNEY.

July 6 1926.

- J. L. LUNDBERG TRANSMISSION Filed Sept.- 27, 19124 6 sheets-shat s A /U//// //////////////vv/ ATTORNEY.

July 6,1926. 1,591,392

J. L.' LUNDBERG f TRANSMISSION Filed Sept. 27, 1924 Is f, 5

7557?, I. Lamaze? purposes. 'One'of 'those purposes is; to' form Patented July 6 1926. It

JOHN L. LUNDBERQ, 0E LPEN MiCHIGAN, n'ssIGNoR To an H OE;ALPENA, MICHIGAN,'A conrolmfrron, or MICHIGAN:

transm ssion.-

Application filed September 27, 924, [serial minute.

j' This invention he relates transmissions and has forits object an improved. force feed lubricated speed reducer, in which' the bearlngs and jack shafts are so arranged asto give maximum rigidity and at the same time counteract' 'as far as possible friction aland wearing forces. This will be more I fully: e51

. plainedhereinafter.

Y F gs.

"Fig.6;f f' b V of designates the [driving shaft, Y b the driven shaft; It is the purpose of thistrans H t drawings? 'i 'Figrli's'a plan view of thetransmission with the 'cover' removed.

Fig; 2 is a longitudinal,-section takenonl the lines- 2 of ru 1;

Fig.3 is a section taken of Fig.1. 'I

mission to providea unit which maybe inserted in t e; power jline to greatly reduce the speed, ofl'the power shaft; thereby at the fs'aine time increase the iorce of the torque. TO this end, instead'offusing thec customary single ja'ck shafntwo stationary jack shafts "c and d are employed These'jack shafts. ex

tend from front (to back of the transmission case and arebolted in place in .the' casi The tastings that form the transmission case and the transmission cover are suitablj moulded to providelanj intervening bridge whichextendsaci'bss the transmission case from sideito side and Whiclisei'ves several a thirdbearing for the .jacli-sha ftsgv which I are here supportedinside of the 'gearhubs f which are"part of the drivin lineof'the' ingflforthese rotatin' 7 ear hubs so as tojpro-* transmission, as will presently be explained.

The bridgethereby' formsan additionalbear-j vide a maximumrig dlty' tojresist the forces set up by the rotatingfmembers in thetransemission. The bridge, as will be apparent I p mission case by suitably "cored andbored casfromlFigs. '2 and i5, serveszthe additional 7 u I which will" be presently" described;

function of" providing an. oil "reservoir ,1 h,

."Now'it o trace theltrainofgearsl I in'g efior't comes through'the driving'shaft a to thespurpinio'n gfwhich meshes with the gearsli and w tu n .i-noppq di e t-- t ions. These gears connected by the. "hubsfj and 3' with the spur'pl nions k and 'Now 'ad l; .'an :j 'a s c k l j mia a a noticedthat'tlie long hubs'g' andg arejour j naled' insuitablegbearings inthe bridge so The driv -l k Thesein turninesh with t l-age gear;

01v INDUSTRIES, 11m;-

carried on a small stationary shaftfmj and in are connected'fb the long 'hubsig and 9 f with the small plnions rand r that are onthe opposite sideof the bridge 0.

These-pinions 4' and'r 'meshwith the final driven gear '3, which is keyed to the driven shaft ,6. fThe driven shaft 6 is supported in suitable bearings in the bridge and in the rear end of the transmission case. It will be that amaximumrigidity is supplied to resist the vibrational forces'set up by the r0 tating parts. L A n V This train'of'gearing thus described: and

in which the jack shaft. 'is duplicated on each side'of the power li ne is animport'ant factor 1 in reducing'the frictional ,forces and the wear onfthe bearings and onth e shafts. The

wearing forcesset; up by the torque ofthe shafts ismorefor lesscounteracted by oppos ing on each side of the powerline equal and to. neutralize, pressure on the bearings orfon the shafts. This is a valuable feature in reducing 'the 'wear' on the bearings, especially oppositelydirected'torques'that therebytend M in "heavy transmission lines 'where great power is transmitted and a" heavy lo ad experienced on the transmission,

It is alsofmost' desirable, in. eavymaq. V chinery of'this' kind to have'the 'best posf j sible' lubrication on account 1 of the heav loadfand the l great' power that is "used. I

am' aware that it is not broadlynew to use a forte .feed pump for distributing lubricant todifierential, f0r'instance,"but5so far as I" 1 know no ,1 one heretofore has ever incorpo;; rated a force feed .p'um'p directly in the trans force feed lubricating cycle which is com pletel iinchrporated in the transmission case I so that there cannot possiblybe any leakage or breaks; and where there is no oil .loss whatsoeve'r, if the transmission cover and gasket are absolutely liquid tight. b

er'ting to the'detalls' of this "force through the bridge, and pinions and gears rotatin at different speeds and forming a train of driven shafts and rotatably-supported on the shafts with hubs having separate bearings in the said bridge;

3. In a transmission, the combination'of 2i case provided with a cover and including a transversely extending bridge forming a center 011 reservoir drive and driven shafts supported in front, and rear of the case and in th bridge, a, jack shaft stationarily supported at the front and rear of the case and gearing connecting the driving and passing through the bridge, a train of gear- I ing connecting the driving and driven shafts and includingzt hub rotatably supported'in a bearing in the bridge, and a pump for tak-i ing iubricant from the bottom of the trans 1n1ss1on;:c aseand forcing the same under 1 20 passageways distributing the same to the e several bearings. I In testimony whereof I have affixed my pressure into the reservoir, together With signature.-

" i g t JOHN L. UNDBER 

